Speaking-tube apparatus



("NO Model.)

G J. QUINSLER.

SPEAKING TUBE APPARATUS.

No. 277,508, Patented May l15, 1883.

N. PETERS. Pmwmmgnphur. wnmngmn. nA f;

UNITED STATES PATENT OFFICE.

GEORGE J. QUINSLER, OF BOSTON, MASSACHUSETTS.

SPEAKING-TUBE APPARATUS.

SPECIFICATION forming part of Letters Patent No. 277,508, dated May 15, 1883,

Application filed October 14, 1882.

To all whom vit may concern Be it known that I, GEORGE J. QUINSLER, a citizen ofthe United States, residing at Boston, in the county of Suffolk and State of Mas sachusetts, have invented certain new and uset'nl Improvements in .Pneumatic Signals; and l do hereby declare that the same are fully describedin the following specification and illustrated in the accompanying drawings.

This invention relates to improvements in pneumatic signals, and itis particularly well adapted for carriagesto establish communication between the occupant of a carriage and the driver, although it is equally useiul as a pneumatic signal and speaking-tube for hotels, steamboats, or private residences, or forother purposes where a pneumatic signal and sound-conveyer may be required.

The invention is carried out as follows, ref'- erence being had to the accompanying drawings, where Figure l represents a side elevation of' the improved pneumatic signalr as applied to a carriage. Figs. 2 and 3 represent detail sectional views ot' the invention.

Similar letters rel'er to similar parts wherever they occur on the dierent parts of the drawings.

Theinventioniscomposed ot'anelastichollow rubber bulb, a, provided in its lower end with a valve-chamber, b, and .a mouth-piece, c, as shown in Figs. 1 and 3. Within the valvechamber b is located a seltclosing valve, b', which is made to close the inner oritice of the mouth-piece c by the agency of a spring, in a similar manner to ordinary speaking-tube mouth-pieces, with this difference, that I employ in my device a solid valve, b', instead of l awhistlevalve, as ordinarily used in speakingtubes. The valve b" is opened from without by means of the crank-wire b", in a similar manner to ordinary speaking-tube mouthpieces. The upper end of the bulb a is connected to and communicates with the conveyer- (No model.)

tube d, which is preferably made iiexible, but may be made rigid, if so desired. The opposite end of the conveyer-tuloe d terminates in a mouth-piece, e, into which is normally inserted the detachable pipe, reed, or whistlej', which is loosely connected to said mouthpiece e by means ot' a suitable cord or chain or strap, g, as shown iu Figs. l and 2.

In Fig. 1 is shown the invention as applied to a carriage, and its operation is as follows: When the occupant of the carriage desires to signal to the driver, he does so sim plyby grasping in one hand the bulb c, and thus compressing the air within the said bulb and forcing it out through the whistlef, that is made to sound to attract the notice ot' the driver, who then removes the whistleffrom the mouth-piece c, and au open speaking-tube is then established from the inside to the outside of the carriage by the occupant opening the valve b by manipulating its crank-wire b, and in this condition a proper, easy, and practical speaking device is established. When the questions and answeis have been made the driver replaces the whistle fin the mouth-piece@ in `,the-position shown in Figs. l and 2, and the pneumatic signal is then ready for another call.

What I wish to secure by Letters Patent, and claim, is

The herein-described pneumatic signal, consisting of the elastic bulb a, valve-chamber b, valve b', and mouth-piece c, in combination with the conveyer-tube d, mouth-piece e, and detachable reed or whistle f, all arranged and combined substantially as described.

In testimony whereof I have affixed my signature in presence of two witnesses.

GEORGE J. QUINSLER.

Vitnesses:

ALBAN ANDRN, HENRY CHADBOURN. 

